RFR(XL): 8167108 - SMR and JavaThread Lifecycle

[Daniel D. Daugherty]

Greetings,

We have a (eXtra Large) fix for the following bug:

8167108 inconsistent handling of SR_lock can lead to crashes
https://bugs.openjdk.java.net/browse/JDK-8167108

This fix adds a Safe Memory Reclamation (SMR) mechanism based on
Hazard Pointers to manage JavaThread lifecycle.

Here's a PDF for the internal wiki that we've been using to describe
and track the work on this project:

http://cr.openjdk.java.net/~dcubed/8167108-webrev/SMR_and_JavaThread_Lifecycle-JDK10-04.pdf

Dan has noticed that the indenting is wrong in some of the code quotes
in the PDF that are not present in the internal wiki. We don't have a
solution for that problem yet.

Here's the webrev for current JDK10 version of this fix:

http://cr.openjdk.java.net/~dcubed/8167108-webrev/jdk10-04-full

This fix has been run through many rounds of JPRT and Mach5 tier[2-5]
testing, additional stress testing on Dan's Solaris X64 server, and
additional testing on Erik and Robbin's machines.

We welcome comments, suggestions and feedback.

Daniel Daugherty
Erik Osterlund
Robbin Ehn